chore: add vendor directory

3 files changed, 355 insertions, 0 deletions

diff --git a/vendor/rustix/src/backend/linux_raw/runtime/mod.rs b/vendor/rustix/src/backend/linux_raw/runtime/mod.rs
new file mode 100644
index 00000000..0b48649c
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/runtime/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod tls;
diff --git a/vendor/rustix/src/backend/linux_raw/runtime/syscalls.rs b/vendor/rustix/src/backend/linux_raw/runtime/syscalls.rs
new file mode 100644
index 00000000..1e00030c
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/runtime/syscalls.rs
@@ -0,0 +1,346 @@
+//! linux_raw syscalls supporting `rustix::runtime`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+#[cfg(target_arch = "x86")]
+use crate::backend::conv::by_mut;
+#[cfg(target_arch = "x86_64")]
+use crate::backend::conv::c_uint;
+use crate::backend::conv::{
+    by_ref, c_int, opt_ref, ret, ret_c_int, ret_c_int_infallible, ret_error, ret_infallible,
+    ret_void_star, size_of, zero,
+};
+#[cfg(feature = "fs")]
+use crate::fd::BorrowedFd;
+use crate::ffi::CStr;
+#[cfg(feature = "fs")]
+use crate::fs::AtFlags;
+use crate::io;
+use crate::pid::{Pid, RawPid};
+use crate::runtime::{Fork, How, KernelSigSet, KernelSigaction, Siginfo, Stack};
+use crate::signal::Signal;
+use crate::timespec::Timespec;
+use core::ffi::c_void;
+use core::mem::MaybeUninit;
+#[cfg(all(target_pointer_width = "32", not(feature = "linux_5_1")))]
+use linux_raw_sys::general::__kernel_old_timespec;
+#[cfg(target_arch = "x86_64")]
+use linux_raw_sys::general::ARCH_SET_FS;
+
+#[inline]
+pub(crate) unsafe fn kernel_fork() -> io::Result<Fork> {
+    let mut child_pid = MaybeUninit::<RawPid>::uninit();
+
+    // Unix `fork` only returns the child PID in the parent; we'd like it in
+    // the child too, so set `CLONE_CHILD_SETTID` and pass in the address of a
+    // memory location to store it to in the child.
+    //
+    // Architectures differ on the order of the parameters.
+    #[cfg(target_arch = "x86_64")]
+    let pid = ret_c_int(syscall!(
+        __NR_clone,
+        c_int(c::SIGCHLD | c::CLONE_CHILD_SETTID),
+        zero(),
+        zero(),
+        &mut child_pid,
+        zero()
+    ))?;
+    #[cfg(any(
+        target_arch = "aarch64",
+        target_arch = "arm",
+        target_arch = "mips",
+        target_arch = "mips32r6",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "powerpc",
+        target_arch = "powerpc64",
+        target_arch = "riscv64",
+        target_arch = "s390x",
+        target_arch = "x86"
+    ))]
+    let pid = ret_c_int(syscall!(
+        __NR_clone,
+        c_int(c::SIGCHLD | c::CLONE_CHILD_SETTID),
+        zero(),
+        zero(),
+        zero(),
+        &mut child_pid
+    ))?;
+
+    Ok(if let Some(pid) = Pid::from_raw(pid) {
+        Fork::ParentOf(pid)
+    } else {
+        Fork::Child(Pid::from_raw_unchecked(child_pid.assume_init()))
+    })
+}
+
+#[cfg(feature = "fs")]
+pub(crate) unsafe fn execveat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    args: *const *const u8,
+    env_vars: *const *const u8,
+    flags: AtFlags,
+) -> io::Errno {
+    ret_error(syscall_readonly!(
+        __NR_execveat,
+        dirfd,
+        path,
+        args,
+        env_vars,
+        flags
+    ))
+}
+
+pub(crate) unsafe fn execve(
+    path: &CStr,
+    args: *const *const u8,
+    env_vars: *const *const u8,
+) -> io::Errno {
+    ret_error(syscall_readonly!(__NR_execve, path, args, env_vars))
+}
+
+pub(crate) mod tls {
+    use super::*;
+    #[cfg(target_arch = "x86")]
+    use crate::backend::runtime::tls::UserDesc;
+
+    #[cfg(target_arch = "x86")]
+    #[inline]
+    pub(crate) unsafe fn set_thread_area(u_info: &mut UserDesc) -> io::Result<()> {
+        ret(syscall!(__NR_set_thread_area, by_mut(u_info)))
+    }
+
+    #[cfg(target_arch = "arm")]
+    #[inline]
+    pub(crate) unsafe fn arm_set_tls(data: *mut c::c_void) -> io::Result<()> {
+        ret(syscall_readonly!(__ARM_NR_set_tls, data))
+    }
+
+    #[cfg(target_arch = "x86_64")]
+    #[inline]
+    pub(crate) unsafe fn set_fs(data: *mut c::c_void) {
+        ret_infallible(syscall_readonly!(
+            __NR_arch_prctl,
+            c_uint(ARCH_SET_FS),
+            data,
+            zero(),
+            zero(),
+            zero()
+        ))
+    }
+
+    #[inline]
+    pub(crate) unsafe fn set_tid_address(data: *mut c::c_void) -> Pid {
+        let tid: i32 = ret_c_int_infallible(syscall_readonly!(__NR_set_tid_address, data));
+        Pid::from_raw_unchecked(tid)
+    }
+
+    #[inline]
+    pub(crate) fn exit_thread(code: c::c_int) -> ! {
+        unsafe { syscall_noreturn!(__NR_exit, c_int(code)) }
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn kernel_sigaction(
+    signal: Signal,
+    new: Option<KernelSigaction>,
+) -> io::Result<KernelSigaction> {
+    let mut old = MaybeUninit::<KernelSigaction>::uninit();
+    let new = opt_ref(new.as_ref());
+    ret(syscall!(
+        __NR_rt_sigaction,
+        signal,
+        new,
+        &mut old,
+        size_of::<KernelSigSet, _>()
+    ))?;
+    Ok(old.assume_init())
+}
+
+#[inline]
+pub(crate) unsafe fn kernel_sigaltstack(new: Option<Stack>) -> io::Result<Stack> {
+    let mut old = MaybeUninit::<Stack>::uninit();
+    let new = opt_ref(new.as_ref());
+    ret(syscall!(__NR_sigaltstack, new, &mut old))?;
+    Ok(old.assume_init())
+}
+
+#[inline]
+pub(crate) unsafe fn tkill(tid: Pid, sig: Signal) -> io::Result<()> {
+    ret(syscall_readonly!(__NR_tkill, tid, sig))
+}
+
+#[inline]
+pub(crate) unsafe fn kernel_sigprocmask(
+    how: How,
+    new: Option<&KernelSigSet>,
+) -> io::Result<KernelSigSet> {
+    let mut old = MaybeUninit::<KernelSigSet>::uninit();
+    let new = opt_ref(new);
+    ret(syscall!(
+        __NR_rt_sigprocmask,
+        how,
+        new,
+        &mut old,
+        size_of::<KernelSigSet, _>()
+    ))?;
+    Ok(old.assume_init())
+}
+
+#[inline]
+pub(crate) fn kernel_sigpending() -> KernelSigSet {
+    let mut pending = MaybeUninit::<KernelSigSet>::uninit();
+    unsafe {
+        ret_infallible(syscall!(
+            __NR_rt_sigpending,
+            &mut pending,
+            size_of::<KernelSigSet, _>()
+        ));
+        pending.assume_init()
+    }
+}
+
+#[inline]
+pub(crate) fn kernel_sigsuspend(set: &KernelSigSet) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_rt_sigsuspend,
+            by_ref(set),
+            size_of::<KernelSigSet, _>()
+        ))
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn kernel_sigwait(set: &KernelSigSet) -> io::Result<Signal> {
+    Ok(Signal::from_raw_unchecked(ret_c_int(syscall_readonly!(
+        __NR_rt_sigtimedwait,
+        by_ref(set),
+        zero(),
+        zero(),
+        size_of::<KernelSigSet, _>()
+    ))?))
+}
+
+#[inline]
+pub(crate) unsafe fn kernel_sigwaitinfo(set: &KernelSigSet) -> io::Result<Siginfo> {
+    let mut info = MaybeUninit::<Siginfo>::uninit();
+    let _signum = ret_c_int(syscall!(
+        __NR_rt_sigtimedwait,
+        by_ref(set),
+        &mut info,
+        zero(),
+        size_of::<KernelSigSet, _>()
+    ))?;
+    Ok(info.assume_init())
+}
+
+#[inline]
+pub(crate) unsafe fn kernel_sigtimedwait(
+    set: &KernelSigSet,
+    timeout: Option<&Timespec>,
+) -> io::Result<Siginfo> {
+    let mut info = MaybeUninit::<Siginfo>::uninit();
+
+    // `rt_sigtimedwait_time64` was introduced in Linux 5.1. The old
+    // `rt_sigtimedwait` syscall is not y2038-compatible on 32-bit
+    // architectures.
+    #[cfg(target_pointer_width = "32")]
+    {
+        // If we don't have Linux 5.1, and the timeout fits in a
+        // `__kernel_old_timespec`, use plain `rt_sigtimedwait`.
+        //
+        // We do this unconditionally, rather than trying
+        // `rt_sigtimedwait_time64` and falling back on `Errno::NOSYS`, because
+        // seccomp configurations will sometimes abort the process on syscalls
+        // they don't recognize.
+        #[cfg(not(feature = "linux_5_1"))]
+        {
+            // If we don't have a timeout, or if we can convert the timeout to
+            // a `__kernel_old_timespec`, the use `__NR_futex`.
+            fn convert(timeout: &Timespec) -> Option<__kernel_old_timespec> {
+                Some(__kernel_old_timespec {
+                    tv_sec: timeout.tv_sec.try_into().ok()?,
+                    tv_nsec: timeout.tv_nsec.try_into().ok()?,
+                })
+            }
+            let old_timeout = if let Some(timeout) = timeout {
+                match convert(timeout) {
+                    // Could not convert timeout.
+                    None => None,
+                    // Could convert timeout. Ok!
+                    Some(old_timeout) => Some(Some(old_timeout)),
+                }
+            } else {
+                // No timeout. Ok!
+                Some(None)
+            };
+            if let Some(old_timeout) = old_timeout {
+                return ret_c_int(syscall!(
+                    __NR_rt_sigtimedwait,
+                    by_ref(set),
+                    &mut info,
+                    opt_ref(old_timeout.as_ref()),
+                    size_of::<KernelSigSet, _>()
+                ))
+                .map(|sig| {
+                    debug_assert_eq!(
+                        sig,
+                        info.assume_init_ref()
+                            .__bindgen_anon_1
+                            .__bindgen_anon_1
+                            .si_signo
+                    );
+                    info.assume_init()
+                });
+            }
+        }
+
+        ret_c_int(syscall!(
+            __NR_rt_sigtimedwait_time64,
+            by_ref(set),
+            &mut info,
+            opt_ref(timeout),
+            size_of::<KernelSigSet, _>()
+        ))
+        .map(|sig| {
+            debug_assert_eq!(
+                sig,
+                info.assume_init_ref()
+                    .__bindgen_anon_1
+                    .__bindgen_anon_1
+                    .si_signo
+            );
+            info.assume_init()
+        })
+    }
+
+    #[cfg(target_pointer_width = "64")]
+    {
+        let _signum = ret_c_int(syscall!(
+            __NR_rt_sigtimedwait,
+            by_ref(set),
+            &mut info,
+            opt_ref(timeout),
+            size_of::<KernelSigSet, _>()
+        ))?;
+        Ok(info.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn exit_group(code: c::c_int) -> ! {
+    unsafe { syscall_noreturn!(__NR_exit_group, c_int(code)) }
+}
+
+#[inline]
+pub(crate) unsafe fn kernel_brk(addr: *mut c::c_void) -> io::Result<*mut c_void> {
+    // This is non-`readonly`, to prevent loads from being reordered past it.
+    ret_void_star(syscall!(__NR_brk, addr))
+}
diff --git a/vendor/rustix/src/backend/linux_raw/runtime/tls.rs b/vendor/rustix/src/backend/linux_raw/runtime/tls.rs
new file mode 100644
index 00000000..bc04a706
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/runtime/tls.rs
@@ -0,0 +1,7 @@
+//! TLS utilities.
+
+/// For use with [`set_thread_area`].
+///
+/// [`set_thread_area`]: crate::runtime::set_thread_area
+#[cfg(target_arch = "x86")]
+pub type UserDesc = linux_raw_sys::general::user_desc;